December weather forecast
Tecapán, El Salvador

December, the first month of the winter in Tecapán, is still a tropical month, with an average temperature varying between 20.7°C (69.3°F) and 31.1°C (88°F).

Temperature

As December takes hold, the average high-temperature is a still tropical 31.1°C (88°F), nearly mirroring that of the previous month. Throughout December, the temperature falls to an average low of 20.7°C (69.3°F).

Heat index

During December, the heat index is calculated to be a fiery hot 38°C (100.4°F). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', arises from combining readings of air temperature and relative moisture content. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In Tecapán, the average relative humidity in December is 69%.

Rainfall

In Tecapán, El Salvador, during December, the rain falls for 4.8 days and regularly aggregates up to 11mm (0.43") of precipitation. Throughout the year, there are 206.2 rainfall days, and 1242mm (48.9") of precipitation is accumulated.

Daylight

With an average of 11h and 18min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 06:01 and sunset at 17:24. On the last day of the month, sunrise is at 06:16 and sunset at 17:37 CST.

Sunshine

The month with the least sunshine is December, with an average of 7.6h of sunshine.

UV index

The months with the highest UV index are January through September and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.
Note: A maximum high UV index of 7 in December translates into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.